table,th,tr,td{
	border: 1px solid #000;
}
input{
	list-style: none;;
	border: none;
	text-align: center;
}
h2{
	text-align: center;
}
table{
	margin-top: 3%;
}
/*提交按钮样式*/
.tj{
	display: inline-block;
	width: 80px;
	height: 30px;
	background-color: #ccc;
	position: relative;
	left: -8%;
	border: none;
	margin-top: 5px;
	margin-bottom: 5px;
}
/*返回按钮样式*/
.return{
	display: inline-block;
	width: 80px;
	height: 30px;
	background-color: #ccc;
	margin-top: 5px;
	vertical-align: top;
	margin-bottom: 5px;
	line-height: 30px;
	text-align: center;
	text-decoration: none;
	color: #000000;
	font-size: 14px;
	position: relative;
	left: -4.7%;
}
.return:hover,.tj:hover{
	opacity: 0.8;
	color: #fff;
	border: 1px solid black;
}
.update{
	margin-left: 50%;
}